关键词: 模糊C均值聚类算法, 距离修正, 三频组合, 有效性指标, 北斗卫星导航系统

Abstract: ThecombinedobservationsanderrorsofBeidousatellitenavigationsystembasedontribanddoubledifferencewerediscussed.AnincrementaldistancecorrectionbasedfuzzyCMeansalgorithmwasproposedtoovercomethedisadvantageoftheclusteringmethod，whichpreviouslyusedtostudythecombinationobservationsofGPStribanddata.Thecorrectclassificationcanbegotbyadjustingthefactorandclustercenterofthesampledistancefromthecentereffectivelytoobtainareasonabledegreeofmembershipandavoiddeterminingthenumberofclustersofhumanirrationality.Thedistancebasedclusteringvalidityindexcorrectionwascreated,andtheoptimalnumberofclusterscanbeautomaticallyobtainedbyintroducinganincrementalwhenthedatawasincreasedbasedontheoriginaldataset.Thenewdatawereclassifiedbasedontheoriginaldatasetwithoutrecalculation.Thefeasibilityandreliabilitywereprovedbythematrixtransformationmethodandtypicalexamples.

Key words: FuzzyCMeans, Distancecorrection, Tribandcombination, Indicatorsofeffectiveness, Beidousatellitenavigationsystem